vigil
/ˈvɪdʒɪl; `vɪdʒəl/ n
1 [U, C] (action or period of) staying awake, esp at night, to keep watch or to pray 保持清醒（尤指夜间）; 不眠（时刻）; 守夜; 夜间祷告
tired out by long nightly vigils at her son's bedside （她）夜里长时间守护在儿子床前而疲惫不堪
hold a candle-light vigil for peace 为和平而举行烛光祈祷.
2 eve of a religious festival, esp one observed by fasting 宗教节日的前夕（尤指斋戒的）
the Easter vigil 复活节前夕.